#!/usr/bin/env ruby

# frozen_string_literal: true

require 'undercover'

module Undercover
  class Changeset
    # Rugged merge_base complains when graft/shallow
    # (https://github.com/libgit2/rugged/issues/846)
    #
    # So we assume we provide the merge-base ourself. Modified from
    # https://github.com/grodowski/undercover/blob/32e62f66682ee566032b5970437ed2934ef29701/lib/undercover/changeset.rb#L74-L78
    def compare_base_obj
      return unless compare_base

      repo.lookup(compare_base.to_s)
    end
  end
end

compare_base = ARGV[0]
compare_base ||= IO.popen(%w[git merge-base origin/master HEAD]) { |p| p.read.chomp }
coverage_file_path = 'coverage/lcov/gitlab.lcov'

# By default undercover includes Ruby related files and only excludes common paths
# like test, spec, *_spec.rb
exclude_file_globs = Undercover::Options::DEFAULT_FILE_EXCLUDE_GLOBS.dup

# We need to exclude more folders:
# EE/JH counterparts for default globs
extension_globs = Undercover::Options::DEFAULT_FILE_EXCLUDE_GLOBS.flat_map do |glob|
  %W[jh/#{glob} ee/#{glob}] unless glob.start_with?('*')
end.compact

exclude_file_globs.concat extension_globs

# These have own specs
exclude_file_globs.concat %w[qa/* gems/* vendor/*]

result = if File.exist?(coverage_file_path)
           Undercover::CLI.run(%W[-c #{compare_base} --exclude-files #{exclude_file_globs.join(',')}])
         else
           warn "#{coverage_file_path} doesn't exist"
           0
         end

exit result
